"2016 January 12" . . . . . . . "No restrictions on access"@en . "United States Holocaust Memorial Museum"@en . . "irn533039" . "No restrictions on use"@en . . . . . . . "Oral history interview with Ralph M. Hockley"@en . "Ina Navazelskis, on behalf of the United States Holocaust Memorial Museum Oral History Branch, conducted the oral history interview with Ralph M. Hockley on January 12, 2016 in Carrollton, TX."@en . "1 digital file, MPEG-4"@en .